JP3266036B2 - Busbar wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar wiring board suitable for miniaturization.

[0002]

2. Description of the Related Art In general, a bus bar wiring board is constituted by arranging a plurality of bus bars in which an upward or downward tab is erected and connected to an insulating substrate, and is used in a state where a plurality of bus bar wiring boards are stacked. Therefore, in order to avoid tabs (connector terminals) projecting up and down through the terminal insertion holes of the laminated insulating substrates, and to avoid circuit crossover within the same insulating substrate,
The bus bar is often provided with a channel-like detour.

[0005] The bus bar wiring board 21 shown in FIG.
Bus bar 23 ₁ and 23 tab 24 ₁ a detour 25 ₁ of channel-shaped respectively in order to avoid the 24 ₂ which rises from below ₂ on 2, an example in which a 25 _2. However, the size of the insulating substrate 22 increases due to the provision of the detours 25 ₁ and 25 ₂ . That is, if it is not necessary to arrange the detours 25 ₁ and 25 ₂ , at least the portion Q on the right side from the line P can be omitted, and the bus bar wiring board 21 can be downsized.

[0004] Therefore, the actual Hei 1-120726 discloses, as shown in FIGS. 6 to 8, busbar 23 ₁ and 23 ₂
Of the bypass path 25 _1, to form a 25 ₂ as the rising bus bar 26 _1, 26 ₂ of the gate-shaped, the bus bars 2
The bus bar wiring boards 2 ₁ and 26 ₂ each have an insulating gap E that does not contact each other when developed on a plane, and are bent and juxtaposed at a distance (distance L) from each other by the insulating gap E.
1 'is disclosed. In the figure, reference numeral 27 denotes an upper cover of the electric connection box accommodating the bus bar wiring board 21 ', and reference numeral 28 denotes a lower cover which also serves as an insulating substrate.

[0005]

However, in the bus bar wiring board 21 ', the two rising edges are the bus bars 26 ₁ , 2.
6 ₂ do not contact each other at the planar development the insulating gap E (FIG. 8
Reference). That is, one bus bar 26
₁ is a size to enter comfortably in the bent space S of the other bus bars 26 _{and second} gate-shaped, when bending the bus bars 26 ₂ is higher than the bus bar 26 _1, as shown in FIG. 7, the height difference h
₀ is possible. Thus, dominated by rising bus bars 26 ₂ having the higher the total height of the laminated bus bar wiring board, it is not possible to achieve sufficient miniaturization, lower punching yield from the metal plate of the bus bar.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a bus bar wiring board having a structure suitable for further reducing the size of the bus bar by increasing the punching yield.

[0007]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, the same surface of an insulating substrate is provided.
A plurality of busbars are disposed on the busbar, one busbar selected from the plurality of busbars is provided with a first detour in a channel shape, and the other busbar is provided with a second detour in a channel shape. A busbar wiring board comprising: a downward gate-shaped busbar formed on one of the first and second detours; and an upward gate-shaped busbar formed on the other detour; At the side edge, the downward gate busbar is disposed downward along the side edge, and the upward gate busbar is approximately the same as the downward gate busbar.
It is characterized by being arranged upwardly extending on the same plane . According to a second aspect of the present invention, the upwardly-facing gate-shaped bus bar is disposed upwardly so as to straddle one of the planar extending portions that support and connect the hanging parts on both sides of the downwardly-facing gate-shaped bus bar.

According to the first aspect of the present invention, since the first and second detours are formed as downward and upward gate-shaped bus bars, respectively, in opposite directions, unlike the conventional upward rising bus bar of the related art. There is no need to make one higher than the other in order to avoid mutual contact or short circuit, and the height of the bus bar wiring board or the laminated bus bar wiring board can be reduced accordingly, and the overall size is reduced. Claim 2
According to the invention, the upwardly-facing gate-shaped bus bar is disposed so as to straddle one of the planar extending portions that support and connect the hanging portions on both sides of the downwardly-facing gate-shaped bus bar. The space can be reduced and the arrangement density of the bus bars and the punching yield of the bus bars from the metal plate can be increased.

As described in claim 3, an upward or downward tab is connected to a desired position such as an end portion or an intermediate portion of each of the plurality of bus bars. Therefore, a laminated bus bar wiring board can be assembled by being superposed like a conventional bus bar wiring board and used as an internal circuit of an electric junction box.

[0010]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1A is a perspective view of a main part of the laminated bus bar wiring board 1 according to the present invention, and FIG. 1B is a perspective view of the main part showing an arrangement process thereof. In the laminated bus bar wiring board 1, a plurality of bus bars 3, 4, 5 ... is disposed on the insulating substrate 2 ₁ of the top layer (first layer from the top), the first bus bar 3 the channel-shaped One detour 6 is provided, and the second bus bar 4 is similarly provided with a second detour 7 in a channel shape. A tab (refer to FIG. 5) as a connector terminal is coupled to a desired portion at an end or an intermediate portion of the bus bars 3, 4, 5,... In an upward or downward direction, but the drawing is not complicated. For,
Illustration is omitted.

[0011] The first bypass passage 6, its tip portion is bent downward, is formed as a downward portal bus bars 6 ', the one side edge of the insulating substrate 2 _1, another insulating laminated It is disposed downward along the side surface of the substrate 2 _2, 2 _3, 2 _4. On the other hand, the tip portion of the second bypass passage 7 is reversed upwardly bent in the above, is formed as an upward portal bus bars 7 ', similarly insulated substrate 2 ₁
Almost a gantry bus bars 6 'Yan Utotomoni down one side edge of the
They are arranged upward to extend on the same plane . The upwardly-facing gate-shaped bus bar 7 'is a planar extension 6A for supporting and connecting the hanging parts 6a, 6b on both sides of the downwardly-facing gate-shaped bus bar 6'.
It is arranged upward while straddling one side (6B) of 6B.

That is, the first bus bar 3 is connected to the insulating substrate 2₁of
Planar extending portions 6A and 6B extending parallel to the side edges in parallel with
And a downwardly-facing gate-shaped bus bar 6 '
It has a channel-like detour 6, and likewise has a second busbar 4
Are above the plane extending portions 7A and 7B extending in parallel and the tips thereof.
Channel-shaped bus bar 7 '
It has a detour 7. Then, the first bus bar 3 extends in a plane.
The space S formed between the installation portions 6A and 6B ₁The second bu
The planar extension 7A of the subbar 4 is provided, and the second busbar
4 is a space S formed between the planar extension portions 7A and 7B._Two
The plane extending portion 6B of the first bus bar 3 is disposed at the second position. This
Thereby, the plane extending portion 6B constitutes the gate-shaped bus bar 7 '.
Mounting portions 7a, 7b on both sides and connecting them
Since the structure is arranged so as to straddle the portion 7c, the first and
2 busbars 3 and 4 are the same without crossing and touching
Insulating substrate 2₁Can be arranged.

The assembly of the laminated bus bar wiring board 1 is shown in FIG.
This is performed as shown in FIG. First, 4,3,2-layer insulating substrate 2 _4, 2 _3, 2 ₂ and each bus bar (not shown) and a superimposed according to conventional methods. Thereafter, repeated insulating substrate 2 ₁ of the first layer to the top layer, the first normal no busbar 3 ... and portal bus bar bus bar 5 ... and with downward portal bus bars 6 'thereon distribution Set up. that time,
Downward portal bus bars 6 'insulating substrate 2 ₁ to 2 obtained by laminating the
_It is arranged in a predetermined position along the side edge of ₄ . Incidentally, Busupa mounting置溝usually corresponds to the bus bars 3, 4, 5 ... each pattern in the surface of the insulating substrate ₂₁ to ₂₄ (not shown) which are recessed, each bus bar corresponding Busupa It is positioned simply by placing it in the mounting groove. Accordingly, the downwardly-facing gate-shaped bus bar 6 'is also positioned at a predetermined position on a specific side edge.

Finally, the second bus bars 4 having an upwardly-facing gate-shaped bus bar 7 'are provided. That is, the first bus bar 3 having the downward-facing gate-shaped bus bar 6 ′ is
₁ and the second bus bar 4 has the space S _{2, so} that the planar extension 7A of the second bus bar 4 has the space S _1.
Among the, also upward portal bus bar 7 of the second bus bars 4 'are arranged without intersecting contact or shorted together across a planar extending portion 6B of the first bus bar 3 by the space S _2.

FIG. 2 is a cross-sectional view of a main part in a state where the laminated bus bar wiring board 1 is housed in an electric connection box 8. 9 is an upper cover of the electric junction box 8, and 10 is a lower cover. As seen in FIG. 2, a downward portal bus bars 6 'insulating substrate 2 ₁ to 2
Are disposed along one side of the upper and lower _4, to protrude upward from the insulating substrate 2 ₁ of the first layer is only the tub (not shown) with the upward portal bus bars 7 '. Since the height h of the upward gate-shaped bus bar 7 'can be arbitrarily formed within a range not more than the projection length of the tab, the entire height H of the electric connection box 8 is set to the height shown in FIG. reliably lowered by the amount of h _0,
The size can be reduced.

FIG. 3 shows the first bus bar 3 of FIG. 1 with the downwardly-facing gate-shaped bus bar 6 'facing upward and the second bus bar 4 with the upwardly-facing portal bus bar 7' facing downward. This is an example in which a gate-shaped bus bar 7 "is bent and formed. In this manner, the downwardly-facing gate-shaped busbars and the upwardly-facing gate-shaped busbars that intersect with each other can be reversely combined.

FIG. 4 shows another embodiment of the present invention, in which the detour 13 of the first bus bar 11 completely enters the detour 14 of the second bus bar 12 and does not cross each other. In this case, the detour 13 of the first bus bar 11
A downwardly-facing gate-shaped bus bar 13 'and an upwardly-facing gate-shaped bus bar 14' are formed on the detour 14 of the second bus bar 12 in the same manner as in FIG.

[0018] Figure 4 and is apparent from comparison with FIG. 7 showing a conventional example (B), since the height difference h ₀ between the two rising bus bars 26 _1, 26 ₂ according to the present invention is eliminated,
Similarly, downsizing of the bus bar wiring board can be achieved.

[0019]

As described above, according to the present invention,
Since the first and second detours are formed as downward and upward gate-shaped bus bars, respectively, in opposite directions, it is not necessary to make one higher than the other in order to avoid mutual contact or short circuit. Only the height of the bus bar wiring board or the laminated bus bar wiring board can be reduced, and the overall size is reduced (claim 1). In addition, since the upward gate-shaped bus bar is disposed so as to straddle one of the planar extending portions that support and connect the hanging parts on both sides of the downward gate-shaped bus bar, the dead space for forming a detour is reduced. The arrangement density of the bus bars and the yield of punching the bus bars from the metal plate can be increased (claim 2). Further, since the plurality of busbars are each formed with an upward or downward tab at a desired position such as an end portion or an intermediate portion, the stacked busbar wiring board is assembled by overlapping the busbars in the same manner as a conventional busbar wiring board. It can be used as an internal circuit of an electric junction box (claim 3).

[Brief description of the drawings]

FIG. 1A is a perspective view showing an example of an embodiment of the present invention in which busbar wiring boards are stacked, and FIG. 1B is a perspective view showing an assembling process thereof.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a perspective view showing a state in which busbar wiring boards according to another embodiment of the present invention are stacked.

FIG. 4 is a perspective view of a bus bar wiring board showing another example of the embodiment of the present invention.

FIG. 5 is an explanatory diagram of a conventional bus bar wiring board.

FIG. 6 is a perspective view of a main part of another conventional bus bar wiring board.

7A is a plan view of a rising bus bar portion of FIG. 6, and FIG. 7B is a cross-sectional view of a main part in a state where the bus bar is housed in an electric connection box.

FIG. 8 is a developed view of the rising bus bar of FIG. 6;

[Explanation of symbols]

1 laminated bus bar wiring board ₂₁ to ₂₄ insulating substrate 3-5 busbar 6,7 detour 6A, 6B plane extending portions 6a, 6b suspended portion 6 'downward portal bus bar 6 "upward portal bus bars 7' upwards Gate Busbar 7 "Downward Gate Busbar 11,12 Busbar

Claims (3)

(57) [Claims] 1. A plurality of bus bars are provided on the same surface of an insulating substrate , a first detour is provided in a channel shape on one bus bar selected from the plurality of bus bars, and the other bus bar is provided on another bus bar. Is a bus bar wiring board provided with a second detour in the form of a channel, wherein a downward gate-shaped bus bar is formed on one of the first and second detours, and an upward gate is formed on the other detour. A bus bar is formed, and at one side edge of the insulating substrate, the downward gate busbar is disposed downward along the side edge, and the upward gate busbar is substantially flush with the downward gate busbar. A bus bar wiring board extending upward and being disposed upward. 2. The bus bar wiring according to claim 1, wherein the upwardly-facing gate-shaped bus bar is disposed upwardly so as to straddle one of the plane extending portions that support and connect the hanging portions on both sides of the downwardly-facing gate-shaped bus bar. Board. 3. The plurality of busbars each have an end,
3. The bus bar wiring board according to claim 1, wherein an upward or downward tab is coupled to a desired position such as an intermediate portion.